JP2019038559A - Packaging bag device - Google Patents

Abstract

To prevent size increase of a packaging bag device due to structural complication when installing multiple web rolls.SOLUTION: A packaging bag device 10 comprises at least intermittent feeding means intermittently feeding cylindrical packaging materials 22A and 22B, and slack preventing means 40. The slack preventing means has dancer shafts 42A and 42B, support shafts 44A and 44B, and driving means 44A-1 and 44B-1 rotatably driving the support shafts, for respective web rolls 20A and 20B. The support shafts 44A and 44B support the web rolls. The dancer shafts 42A and 42B press upper faces of the cylindrical packaging materials from the web rolls and fold back the cylindrical packaging materials, and are vertically movable. The driving means 44A-1 and 44B-1 of the support shafts actuate so as to interlock with the corresponding dancer shafts 42A and 42B, to control drawing out of the cylindrical packaging materials, respectively.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wrapping apparatus that continuously forms a package (bag).

  2. Description of the Related Art A packaging apparatus is known in which a packaging body is continuously formed by applying a lateral seal or the like to a packaging material (for example, a film material made of a plastic film or the like) that is a raw material of the packaging body.

An original fabric roll obtained by winding a packaging material in a roll shape is attached to the bag-wrapping device. The original roll is a roll of a film material wrapped in a roll as it is, or a roll of film material (cylinder wrapping material) that has been formed into a cylindrical shape in advance. The
In the case of an original fabric roll wound with one film material, an even number, for example, two original rolls are provided in the bag-wrapping device. Inside the bag-wrapping device, there are two pairs of original rolls, and the film materials drawn from one set (two) of the original rolls are overlapped vertically, and the left and right ends are cylindrically wrapped by vertical sealing means. A cylindrical packaging material is formed by sealing in the extending direction (longitudinal direction; drawing direction) of the material.

  The cylindrical packaging material is extended from the raw roll in the bag-wrapping device, and intermittently fed in the longitudinal direction (forward and downstream directions) of the cylindrical packaging material by the intermittent feeding means. For example, between the intermittent feed and the next intermittent feed, the tubular packaging material is stretched by the slack preventing means, the slack of the tubular packaging material is removed, and the inside of the bag-wrapping device is transferred.

The cylindrical packaging material is laterally sealed in a direction (width direction, left-right direction) perpendicular to the longitudinal direction (feeding direction) of the cylindrical packaging material by the horizontal sealing means at a constant interval, and by the perforation processing means. A perforation in the width direction is provided in the vicinity of the horizontal seal, and the package is continuously formed.
When not only forming a package but also filling an article into each package, for example, the perforation on the upper surface of the tubular package is broken by a cutting means to provide an opening. Then, the article is filled from the opening by the filling means, and a package body containing the article is continuously formed (for example, JP-A Nos. 2003-341608 and 2015-074451).
In addition, each package is printed on the upper surface as necessary, and is further laterally sealed (sealed) at the lower part of the opening, or the perforation on the lower surface is broken to be separated into individual packages.

  For example, Japanese Patent Application Laid-Open Nos. 2003-341608 and 2015-074451 describe a bag-wrapping device provided with four original rolls obtained by winding a single film material (for example, a plastic film) into a roll shape. ing. Four original fabric rolls are made into one set, and two cylindrical packaging materials (two rows) are formed by superimposing top and bottom packaging materials (one set) extending from the original fabric rolls and vertically sealing by means of vertical sealing. It is formed. Then, a series of means for forming a package, such as intermittent feeding means and slack prevention means, are respectively applied to the two cylindrical packaging materials.

In Japanese Patent Application Laid-Open No. 2003-341608, a cylindrical packaging material is linearly stretched (transferred), and a series of means for forming a package is provided along a path through which the cylindrical packaging material is transferred. Yes. That is, a series of means are juxtaposed in two rows in the width direction of the cylindrical packaging material along a linear path along which the cylindrical packaging material is transferred.
In JP-A-2015-074451, a plurality of guide shafts are provided in the bag-wrapping device. The two cylindrical wrapping materials are folded back by the guide shaft, and their paths meander and are extended (transferred). The two paths of the cylindrical packaging material are configured not to overlap each other in the bag-wrapping device.

JP 2003-341608 A Japanese Patent Application Laid-Open No. 2015-074451

In Japanese Patent Application Laid-Open No. 2003-341608, a series of means for forming a packaging body are juxtaposed for two rows in the width direction of the cylindrical packaging material. Body productivity is doubled.
However, this is substantially the same as the configuration in which two wrapping devices are installed in the width direction of the cylindrical wrapping material, and the wrapping device is increased in size, and a large space is required for the installation of the wrapping device.

In Japanese Patent Application Laid-Open No. 2015-074451, the two paths of the cylindrical packaging material do not overlap each other. Therefore, when a malfunction occurs in the cylindrical packaging material, the location of the malfunction is quickly determined by visual inspection, and a new raw roll is obtained. Can be replaced.
However, it is not easy to attach the two packaging materials so that the paths do not overlap with each other, and the configuration of the packaging apparatus including the path becomes complicated, and an increase in the size of the packaging apparatus is inevitable.

  An object of the present invention is to provide a wrapping apparatus with a simple configuration that can realize high productivity even if it is downsized.

In the present invention, slack prevention means are provided for at least two of the original rolls. The slack prevention means has a dancer shaft, a support shaft, and a drive means for rotationally driving the support shaft, and the dancer shaft and the drive means for the support shaft are operated in an interlockable manner.
That is, according to the present invention according to claim 1, the intermittent feeding means for pulling the cylindrical packaging material from the raw fabric roll in which the cylindrical packaging material in which the film material is formed into a cylindrical shape is wound in a roll shape, and intermittently feeding it. A loosening prevention means for preventing looseness of the pulled-out cylindrical packaging material, wherein the cylindrical packaging material is drawn out from at least two raw rolls arranged in the width direction and intermittently fed. The means has intermittent feed driving means for intermittently feeding the cylindrical packaging material, and the slack prevention means has a dancer shaft, a support shaft, and a drive means for rotationally driving the support shaft, and the raw roll The support shaft supports the raw roll, and the dancer shaft is arranged in parallel to the support shaft, and presses the upper surface of the cylindrical packaging material drawn from the raw roll to When folded In both cases, it is possible to operate in the vertical direction, and the drive means of the support shafts operate in conjunction with the corresponding dancer shafts to control the withdrawal of the tubular packaging material from the raw rolls, respectively. The shafts are spaced apart from each other in the vertical direction.

Since the slack prevention means is provided for each of the raw rolls, and the dancer shaft of the slack prevention means is arranged apart from the top and bottom, the packaging apparatus does not take up space in the width direction, and the packaging apparatus Can be miniaturized. And since at least 2 original fabric rolls are installed, compared with the case where there is one original fabric roll, high productivity is realizable.
In addition, since the cylindrical packaging material is controlled by the driving means of the support shaft and the corresponding dancer shaft, respectively, the pulling out from the raw roll is controlled, and the path only needs to be folded at least by the dancer shaft. The configuration of the bag-wrapping device is simplified.

(A) is a schematic side view of a wrapping apparatus according to an embodiment of the present invention when one (left) original fabric roll is attached and (B) is the other (right) original fabric roll. In FIGS. 1 (A) and 1 (B), the cylindrical packaging material stretched from one (left) original fabric roll is shown by a one-dot chain line (FIG. 1 (A)) and pulled from the other (right) original fabric roll. The extended cylindrical packaging material is represented by a two-dot chain line (FIG. 1B). The perspective view of the partial fracture | rupture of a bag-wrapping apparatus is shown. The fragmentary perspective view of a slack prevention means is shown. The schematic of the package (bag body) continuously formed with the bag-wrapping apparatus is shown. The top view of the support shaft to which an original fabric roll is attached is shown. (A) is a right limit switch, and (B) is a flow chart showing operations related to intermittent feed means and slack prevention means in the left limit switch.

  Intermittent feeding means for intermittently feeding the cylindrical packaging material from the roll roll of the cylindrical packaging material in which the film material is formed into a roll shape, and slack for preventing the loosening of the drawn cylindrical packaging material And a preventive means, wherein the cylindrical packaging material is pulled out from at least two raw rolls arranged in the width direction, and the intermittent feeding means intermittently feeds the cylindrical packaging material intermittently. The slack prevention means includes a dancer shaft, a support shaft, and a drive means for rotationally driving the support shaft, and is provided for each original roll. The dancer shaft is arranged in parallel with the support shaft, presses the upper surface of the cylindrical packaging material drawn from the raw roll and folds the cylindrical packaging material, and can be operated vertically. The drive means of the shaft are respectively operated so as to be able to be interlocked with the corresponding dancer shafts to control the withdrawal of the cylindrical packaging material from the raw roll, and the respective dancer shafts are arranged apart from each other in the vertical direction. .

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1A is a schematic side view of a wrapping apparatus according to an embodiment of the present invention when one (left) original fabric roll is attached, and FIG. 1B is the other (right) original fabric roll attached. Each is shown. In FIGS. 1 (A) and 1 (B), the cylindrical packaging material stretched from one (left) original fabric roll is shown by a one-dot chain line (FIG. 1 (A)) and pulled from the other (right) original fabric roll. The extended cylindrical packaging material is represented by a two-dot chain line (FIG. 1B). 2 is a partially broken perspective view of the bag-wrapping device, and FIG. 3 is a partial perspective view of the slack preventing means.
The front, rear, left and right are Fr (front; downstream of the path of the cylindrical packaging material), Rr (rear; upstream), L (left), with the transport direction of the cylindrical packaging material extended from the raw roll being forward. , R (right).

As shown in FIGS. 1A, 1B, and 2, the bag-wrapping device 10 includes a substantially rectangular frame (main body) 10-1 and a pair of left and right arms 10- extending rearward from the lower part of the frame. 2. The pair of left and right arms 10-2 support the fabric rolls 20A and 20B via support shafts 44A and 44B described later. The raw fabric rolls 20A and 20B are formed by winding cylindrical packaging materials 22A and 22B formed of a film material into a cylindrical shape, and are attached (set) to support shafts 44A and 44B described later.
As shown in FIG. 2, in the embodiment, one (left) original fabric roll 20A and the right original fabric roll 20B are used. Hereinafter, “A” is attached to the member relating to the left original fabric roll after the symbol indicating each member, and “B” is attached to the member relating to the other (right) original fabric roll after the symbol indicating each member. ing. For example, 22A represents a cylindrical packaging material drawn from the left original fabric roll, and 22B represents a cylindrical packaging material drawn from the right original fabric roll.

The frame body 10-1 includes intermittent feeding means 30, loosening prevention means 40, lateral sealing means 50, perforation processing means 60, cutting means 70, and filling means 80. However, the configuration of the frame body 10-1 (wrapping device 10) is not limited to this, and it is sufficient that at least the intermittent feeding means 30 and the slack prevention means 40 are provided.
Moreover, in FIG. 1 (A) (B), FIG. 2, although two original fabric rolls 20A and 20B are installed in the width direction and are supported by the arm 10-2, the number of original fabric rolls is However, the present invention is not limited to this, and it is sufficient that at least two raw rolls are provided.
The cylindrical packaging materials 22A and 22B extended from the two original fabric rolls 20A and 20B are juxtaposed in the width direction (left and right direction), and are transferred through the frame 10-1 by the intermittent feeding means 30.

As can be seen from FIGS. 1A and 1B, the intermittent feeding means 30 is located on the downstream side of the path of the cylindrical packaging materials 22A and 22B in the frame 10-1. The intermittent feed means 30 rotationally drives the original fabric feed shaft 32 provided in the left-right direction (the width direction of the cylindrical packaging material), the pressing shaft 34 located above the original fabric feed shaft, and the original fabric feed shaft. Thus, it is configured to have a drive means 36 for feeding the raw material for intermittently feeding the cylindrical package. Each of the raw fabric feed shaft 32 and the holding shaft 34 is a single shaft laid horizontally in the frame body 10-1, and a rubber material is wound around the surface of the raw fabric feed shaft, for example, in a cylindrical shape. The sliding of the packaging materials 22A and 22B is prevented.
The two cylindrical packaging materials 22A and 22B are simultaneously sandwiched between the raw fabric feed shaft 32 and the holding shaft 34. Then, the raw fabric feed shaft 32 rotates by the raw fabric feed driving means 36 toward the downstream direction of the path of the two cylindrical packaging materials 22A and 22B, thereby simultaneously transferring the two cylindrical packaging materials downstream. (Intermittent feed).

  The slack prevention means 40 (40A, 40B) is a roll of raw roll (in order to prevent (remove) the slack of the cylindrical packaging materials 22A, 22B extended from the raw rolls 20A, 20B by the intermittent feeding means 30. Each cylindrical packaging material) is provided upstream of the cylindrical packaging material along the transfer path of the cylindrical packaging material. A specific configuration of the slack preventing means 40 (40A, 40B) will be described later.

The horizontal sealing means 50 and the perforation processing means 60 are provided, for example, between the intermittent feeding means 30 and the slack preventing means 40A, 40B, that is, upstream of the intermittent feeding means and downstream of the slack preventing means.
FIG. 4 shows a schematic view of a package (bag) formed continuously by the bag-wrapping device. Although FIG. 4 illustrates the package 22A ′ formed from the cylindrical packaging material 22A, the packaging body 22B ′ formed from the cylindrical packaging material 22B has the same configuration.
For example, as can be seen from FIG. 4 in conjunction with FIGS. 1 (A) and 1 (B), the lateral seal means 50 applies lateral seals 52 at regular intervals in the width direction (left-right direction) of the cylindrical packaging material 22A. Defines the bottom of the package 22A ′. The perforation processing means 60 is provided with a perforation 62 in the width direction of the cylindrical packaging material in the vicinity of the horizontal seals of the cylindrical packaging materials 22A and 22B, specifically at a position slightly downstream of the horizontal seal 52. ing. The perforations 62 are simultaneously provided on the upper surface and the lower surface of the cylindrical packaging material by applying, for example, sawtooth teeth from above the cylindrical packaging materials 22A and 22B.

The cutting means 70 and the filling means 80 are provided downstream of the intermittent feeding means 30. For example, the cutting means 70 cuts only the perforations 62 on the upper surfaces of the cylindrical packaging materials 22A and 22B. By cutting only the upper perforation 62 without cutting the perforations on the lower surfaces of the cylindrical packaging materials 22A and 22B, an opening 72 is provided on the upper surface to fill small articles 74 and the like from the openings, and a plurality of packaging The bodies 22A ′ and 22B ′ can be formed continuously (connected) on the lower surface.
For example, as shown in FIGS. 1A and 1B, the filling means 80 is configured to have a filling port 82 of the article 74 and a claw 84 that holds the opening. The nail | claw 84 hold | suppresses the edge of the opening 72 of the upper surface of a cylindrical packaging material, and the article 74 prepared beforehand is sent into the inside of an opening (cylindrical packaging material) from the filling port 82. FIG.

  It should be noted that the individual packaging bodies 22A ′ and 22B ′ are laterally sealed again at a position downstream (front) from the opening 72 as necessary to close the opening, or the perforation 62 on the lower surface is broken to form individual packaging. It may be separated into bodies.

A specific configuration of the slack preventing means 40 will be described.
The slack preventing means 40 (40A, 40B) includes dancer shafts 42A, 42B, support shafts 44A, 44B for the raw roll, and support shaft drive means 44A-1, 44B-1 for rotationally driving the support shaft. And it is provided for each of the original fabric rolls 20A and 20B (tubular packaging materials 22A and 22B).
Referring to FIGS. 1A, 1B, and 2, the dancer shafts 42A and 42B are in the frame 10-1, support shafts 44A and 44B for the raw roll, and drive means 44A-1 and 44B-1 for the support shafts. Is provided outside the frame 10-1, but is not limited to this configuration.

2 and 3, for example, a pair of left and right auxiliary plates 10-1 'are provided on the inner surface of the frame 10-1. In addition to the dancer shafts 42A and 42B, a pair of (two) auxiliary shafts 48 and 48 'separated from each other are attached to the auxiliary plate 10-1'. For example, reference numeral 48 is a rear auxiliary shaft, and reference numeral 48 'is a front auxiliary shaft.
A pair of mounting holes 48-1 and 48 ′-1 are formed on the left and right sides of the upper part of the auxiliary plate 10-1 ′ in a horizontal direction. The two auxiliary shafts 48, 48 'separated from each other in the front-rear direction are fitted between the left and right mounting holes 48-1, 48'-1 and horizontally between the left and right auxiliary plates 10-1. It is installed (attached).
That is, as can be seen from FIG. 2, the pair of auxiliary shafts 48 and 48 'are provided in front of and behind the dancer shafts 42A and 42B, in parallel with the dancer shaft and above the dancer shaft so as not to move with respect to the dancer shaft. Yes.

  The two dancer shafts 42A and 42B are respectively arranged in the frame 10-1 so as to be parallel to the support shafts 44A and 44B of the raw fabric rolls 20A and 20B. As will be described in detail later, the dancer shaft 42A is wound around the cylindrical packaging material 22A drawn from the left original fabric roll, and the dancer shaft 44A is wound around the cylindrical packaging material 22B drawn from the right original fabric roll. .

Long holes 46A and 46B extending in the vertical direction are formed on the left and right sides of the auxiliary plate 10-1 ′ so as to be separated from each other in the vertical direction. 2 and 3, for example, the long holes 46A and 46B are arranged in the vertical direction, and one long hole 46A is formed above the other long hole 46B. The dancer shafts 42A and 42B are horizontally installed between the left and right auxiliary plates 10-1, and the left and right terminals are respectively guided by elongated holes extending in the vertical direction, and slide in the vertical direction. That is, the long hole 46A serves as a guide groove for guiding the movement (sliding) of the dancer shaft 42A in the up-down direction and the long hole 46B for the dancer shaft 42B.
The dancer shafts 42A and 42B are movable in the vertical direction, whereas the front and rear auxiliary shafts are fitted in the mounting holes 48-1 and 48'-1 of the auxiliary plate 10-1 ', It is impossible to move.
2 and 3, on the upper front side of the long holes 46A and 46B, a pair of left and right limit switches 42A-1, 42A-1 ', 42B-1, 42B having a substantially rectangular parallelepiped shape, which will be described later. -1 'is attached respectively. In the pair of left and right long holes 46A located above, the right limit switch 42A-1 is attached to the right long hole, and the left limit switch 42A-1 'is attached to the left long hole. Similarly, in the pair of left and right long holes 46B positioned below, the right limit switch 42B-1 is attached to the right long hole, and the left limit switch 42B-1 'is attached to the left long hole.

First, the right limit switches 42A-1 and 42B-1 will be described.
Of the right limit switches shown in FIG. 2 and FIG. 3, the configuration of the limit switch 42A-1 positioned above will be described. On the right auxiliary plate 10-1≡, a right limit switch 42A-1 is attached to a position on the upper front side of the long hole 46A. The wire 42A-2 extends obliquely downward from the rear surface of the right limit switch 42A-1 downward and rearward (toward the lower end of the long hole 46A in FIG. 3). As can be seen from FIG. 3, the wire 42A-2 is positioned such that when the dancer shaft 42A slides up and down in the elongated hole 46A, the front surface of the right part of the dancer shaft abuts (presses). .
The right limit switch 42A-1 is set to be turned off when it is raised to a certain height and turned on when it is lowered to a certain height. The position (height) at which the right limit switch 42A-1 is set to ON is, for example, the position of the lower end in the long holes 46A and 46B.
Of the right limit switches, the limit switch 42B-1 positioned below has the same configuration, but of course is not limited to this configuration.

Next, the left limit switches 42A-1 ′ and 42B-1 ′ will be described.
Of the left limit switches shown in FIGS. 2 and 3, the configuration of the limit switch 42A-1 ′ positioned above will be described. On the left auxiliary plate 10-1≡, a left limit switch 42A-1 ′ is attached to a position on the upper front side of the long hole 46A, more specifically, to a position on the upper front side of the long hole.
The left limit switch 42A-1 ′ is set to be turned on when the dancer shaft 42A reaches the upper limit height. For example, the upper limit (height) of the left limit switch 42A-1 ′ is the upper end of the long hole 46A, and the left end switch of the dancer shaft 42A is kept in contact with the upper end of the long hole. Turn on. As will be described later, the left limit switch 42A-1 ′ notifies that the original fabric roll 20A has run out. For example, the on-setting is canceled by temporarily stopping the bag-wrapping device 10.
The limit switch 42B-1 ′ located below the left limit switch has the same configuration, but of course is not limited to this configuration.

  That is, the right limit switches 42A-1 and 42B-1 are within a range (time) in which the ON setting of the left limit switches 42A-1 ′ and 42B-1 ′ is not activated, that is, the original rolls 20A and 20B are present. The sliding in the long holes 46A and 46B of the dancer shafts 42A and 42B is detected by the wires 42A-2 and 42B-2.

  2 and 3, the auxiliary plate 10-1 ′ is provided. However, the present invention is not limited to this, and the long holes 46 </ b> A and 46 </ b> B are provided on the inner surface of the frame body 10-1 without providing the auxiliary plate. Auxiliary shafts 48, 48 'may be provided directly. However, as in the embodiment, when the auxiliary plates 10-1 ′ are provided with the long holes 46A and 46B and the auxiliary shafts 48 and 48 ′ are attached to the auxiliary plates and installed in the frame 10-1, the frame Configuration is not complicated.

Further, in the embodiment, two cylindrical packaging materials 22A and 22B (raw fabric rolls 20A and 20B) are juxtaposed on the left and right, and two dancer shafts 42A and 42B are provided on the left and right sides corresponding to the number of cylindrical packaging materials. Two pairs of long holes 46A and 46B are also provided. However, the number of dancer shafts and long holes is not limited to this.
In FIG. 2 and FIG. 3, the two elongated holes 46A and 46B extending in the vertical direction are arranged on the left and right sides of the auxiliary plate 10-1 ′ in the vertical direction. The position and the number of long holes are not limited to this. For example, if the relative positions of the long holes 46A and 46B are described, the respective long holes are provided at positions that do not interfere with sliding (that is, operation in the vertical direction) in the long holes of the corresponding dancer shafts 42A and 42B. Just do it. As for the number of the long holes 46A and 46B, the long holes 46A and 46B are not separate (two) long holes, but have a common (1) shape that does not interfere with sliding of the dancer shafts 42A and 42B. May be a long hole. For example, if one or a plurality of constrictions through which the respective dancer shafts cannot pass are provided at the upper and lower intermediate positions, etc., two or more dancer shafts can slide in the vertical direction with one long hole without interference.
That is, the plurality of dancer shafts 42A and 42B only need to be guided by one or more long holes that can slide without interfering with each other and can slide in the vertical direction.

  FIG. 5 shows a plan view of the support shaft to which the original roll is attached. The support shaft drive means 44A-1 and 44B-1 are respectively provided at the outer terminals of the support shafts 44A and 44B, and are independently rotatable.

The support shafts 44A and 44B have a hollow shape, and one common holding shaft 144 extends inside thereof. And outer flange 144A-1, 144B-1 is being fixed to the terminal (adjacent terminal) inside support shaft 44A, 44B, respectively. In other words, the support shafts 44A and 44B are cantilever beams fixed by the outer flanges 144A-1 and 144B-1. And as shown in FIG. 5, as for the outer flanges 144A-1 and 144B-1, the inner terminal is separated in the left-right direction.
In addition, two bearings 144A-2 and 144B-2 are arranged between the left and right ends of the support shafts 44A and 44B and the holding shaft 144, respectively, so that the support shaft can rotate independently around the holding shaft. Each is held. For example, the bearings 144A-2 and 144B-2 are provided with bearings, respectively, so that the support shafts 44A and 44B can rotate independently about the holding shaft 144, respectively.

Original fabric holders 144A-3 and 144B-3 on which the original fabric rolls 20A and 20B are placed are attached to the support shafts 44A and 44B, respectively. The left original fabric holder 144A-3 is formed of two holder pieces 144A-31 and 144A-32 separated on the left and right, and the left (outer) holder piece is the side facing the right holder piece 144A-32. In the right stepped shape, the peripheral surface of the right part is formed as an inclined surface having a truncated cone shape that extends to the left side on the side facing the holder piece 144A-32. The right (inner) holder piece 144A-32 is located to the left of the outer flange.
The right original fabric holder 144B-3 is formed of two holder pieces 144B-31 and 144B-32 separated to the left and right, and has a symmetrical shape with the original fabric holder 144A-3.

The mounting (set) of the fabric rolls 20A and 20B on the support shafts 44A and 44B will be described. The inner holder pieces 144A-32 and 144B-32 are integrally rotated with the support shaft in advance by, for example, screwing. Mounted as possible.
Then, for example, regarding the left original fabric roll 20A, the original fabric roll is slid on the support shaft 44A until the inner surface of the left original fabric roll abuts against the outer flange 144A-1. Then, the holder piece 144A-31 is slid on the support shaft 44A until the inclined surface of the holder piece 144A-3 is pressed by the original fabric roll 20A and sandwiches the original fabric roll 20A with the holder piece 144A-32. The The holder piece 144A-31 is attached to the support shaft 44A so as to be rotatable integrally with the support shaft 44A by, for example, screwing in a state where the raw roll 20A is sandwiched between the two holder pieces 144A-31, 144A-32. It is done.
Since the outer holder piece 144A-31 has a slope on the side in contact with the original fabric roll 20A, and this inclined surface is pressed by the original fabric roll, the original fabric holder 144A-3 has two holder pieces 144A-31, 144A. The original fabric roll 20A is mounted with the original fabric roll securely sandwiched between -32 without any gap.
Similarly, the right original fabric roll 20B is also sandwiched between the two holder pieces 144B-31, 144B-32, and the original fabric roll 20B is mounted.

Each of the support shaft drive means 44A-1 and 44B-1 is, for example, a motor, and the motor is supported by a pair of left and right arms 10-2 extending from the frame body 10-1. Not) extend from the motor in the opposite direction (inward).
The drive means 44A-1 on one side (left) will be described. The drive means 44A-1 has two cylindrical rotating bodies 44A-11 'and 44A-12' juxtaposed to each other and extending horizontally. When the motor is driven, the two cylindrical rotating bodies are rotated in the same direction in synchronization.

As can be seen from FIG. 5, the two cylindrical rotating bodies 44A-11 ′ and 44A-12 ′ are separated from each other by a distance that allows the support shaft 44A to be placed. It is placed between the rotating bodies.
Then, when the driving means (motor) 44A-1 is driven and the cylindrical rotating bodies 44A-11 ′ and 44A-12 ′ are rotated in the same direction, the support shaft 44A on the cylindrical rotating body rotates. Thus, the cylindrical packaging material 22A is fed (transferred) from the raw roll 20A into the frame.
The support shaft drive means 44B-1 is symmetrical to the support shaft drive means 44A-1. Similarly to the drive unit 44A-1, the support shaft drive unit 44B-1 ′ is rotated in the same direction by two cylindrical rotating bodies 44B-11 ′ and 44B-12 ′ that are juxtaposed and extend horizontally. As a result, the support shaft 44B on the cylindrical rotating body rotates.

  The right limit switches 42A-1 and 42B-1 and the left limit switches 42A-1 'and 42B-1' are respectively linked (communication) with the corresponding driving means 44A-1 and 44B-1 of the support roll of the original roll. ) It is possible. For example, the support shaft driving means 44A-1 and 44B-1 include a receiving device (not shown) capable of electrical communication, and the right limit switches 42A-1 and 42B-1 and the left limit switch 42A-1 are provided. ', 42B-1' incorporates a transmitting device (not shown) capable of communicating the limit switch state (ON / OFF) to a receiving device (not shown) of the support shaft, for example. In other words, a pair of left and right limit switches corresponding to the respective dancer shafts 42A and 42B (a pair of left and right limit switches 42A-1 and 42A-1 'corresponding to the dancer shaft 42A, and a pair of left and right limit switches corresponding to the dancer shaft 42B) 42B-1 and 42B-1 ′) can be linked to the driving means 44A-1 and 44B-1 of the support shafts of the corresponding original rolls 20A and 20B by communication. That is, since the cylindrical packaging material 22A extended from the left original fabric roll 20A is stretched over the dancer shaft 42A (FIG. 2), the right and left provided in the elongated hole 46A in which the dancer shaft slides. The pair of limit switches 42A-1 and 42A-1 ′ can communicate with the driving means 44A-1 of the support shaft of the corresponding original roll. Similarly, since the cylindrical packaging material 22B extended from the right original fabric roll 20B is stretched over the dancer shaft 42B (FIG. 2), it is provided in the long hole 46B in which the dancer shaft slides. The pair of left and right limit switches 42B-1 and 42B-1 ′ can communicate with the driving means 44B-1 of the support shaft of the corresponding original roll.

  The right limit switches 42A-1 and 42B-1 and the left limit switches 42A-1 ′ and 42B-1 ′ are respectively interlocked with the corresponding drive means 44A-1 and 44B-1 of the support shaft of the original roll. Although it is possible, none of the left and right limit switches are interlocked with the intermittent feeding means 30 (the original fabric feed shaft 32, the original fabric feed driving means 36, etc.).

With reference to FIGS. 1 (A), 1 (B), and 2, the paths of the cylindrical packaging materials 22A, 22B drawn from the original fabric rolls 20A, 20B will be described. Since the paths of the cylindrical packaging materials 22A and 22B have the same configuration, the path of the cylindrical packaging material 22A drawn from the left raw roll 20A will be described first.
The front end of the left original fabric roll 20A disposed behind the frame body 10-1 is gripped, and the cylindrical packaging material 22A is pulled forward and upward, and is stretched over the upper surface of the rear auxiliary shaft 48 from the rear. The cylindrical packaging material 22A is wound downward on the upper surface of the rear auxiliary shaft 48, and is wound and folded back from the rear surface of the dancer shaft 42A. Further, it is drawn upward in front of the dancer shaft 42A, and spanned from the rear on the upper surface of the front auxiliary shaft 48 ′ (FIG. 2). That is, the cylindrical packaging material 22A of the raw roll 20A is wound (partially wound) on the upper surface of the rear auxiliary shaft 48, the lower surface of the dancer shaft 42A, and the upper surface of the front auxiliary shaft 48 ′. The rear auxiliary shaft 48, the dancer shaft 42A, and the front auxiliary shaft 48 ′ are bridged between the three shafts in this order.
The front and rear auxiliary shafts 48 and 48 'are fitted and fixed to the left and right mounting holes 48-1 and 48'-1 formed on the auxiliary plate at both ends, and cannot move with respect to the dancer shaft 42A. Yes. Therefore, under a constant tension, the dancer shaft 42A slides up and down in the left and right long holes (guide holes) 46A, and the cylindrical packaging material 22A is smoothly smoothed from the original roll 20A by a predetermined length. Sent out.
Then, the cylindrical packaging material 22A is horizontally stretched forward (downstream) from the front auxiliary shaft 48 ′, passes directly below the lateral sealing means 50 and the perforation processing means 60, and is a raw material of the intermittent feeding means. It is passed between the feed shaft 32 and the holding shaft 34 and is extended to the cutting means 70 and the filling means 80.

  Similarly, the cylindrical packaging material 22B is also wound (partially wound) on the upper surface of the rear auxiliary shaft 48, the lower surface of the dancer shaft 42B, and the upper surface of the front auxiliary shaft 48 ', respectively. The shaft 48, the dancer shaft 42B, and the front auxiliary shaft 48 ′ are bridged between the three shafts in this order. The cylindrical packaging material 22B passes directly under the horizontal sealing means 50 and the perforation processing means 60, and is passed between the raw fabric feed shaft 32 and the holding shaft 34 of the same intermittent feeding means as the cylindrical packaging material 22A. The cutting means 70 and the filling means 80 are extended.

  In addition, in Example, since the original fabric rolls 20A and 20B are juxtaposed in the width direction, the paths of the cylindrical packaging materials 22A and 22B are similarly arranged in parallel in the width direction of the original fabric roll (cylindrical packaging material). Has been. In FIG. 2, the original fabric roll 20A is juxtaposed to the left and the original fabric roll 20B is juxtaposed to the right, and the paths of the cylindrical packaging materials 22A and 22B extending from the original fabric rolls are also arranged in parallel in the left and right directions, respectively. 1 is extended.

FIG. 6A is a flow chart showing operations related to the intermittent feed means and the slack prevention means in the right limit switch, and FIG. 6B is the left limit switch.
With reference to FIGS. 6A and 6B, the operation relating to the loosening prevention means 40 will be described in detail.
In the present invention, a pair of left and right limit switches (right limit switches 42A-1, 42B-1, left limit switches 42A-1 ′, 42B-1 ′) are provided with a slack prevention means 40 (specifically, left and right support shafts). 44A-1 and 44B-1).
Since the left and right limit switches have different functions, the operation related to the upper right limit switch 42A-1 among the right limit switches will be described with reference to FIG.
The lower right limit switch 42B-1 operates in the same manner as the upper right limit switch 42A-1.

  First, the fabric roll 20A (related to the upper limit switch 42A-1 positioned above) is placed on the fabric holder 144A-3 by the operator of the bag-wrapping apparatus 10, respectively. Then, the cylindrical packaging material 22A is pulled out from the raw fabric roll 20A, passes through the auxiliary shaft 48, the dancer shaft 42A, and the front auxiliary shaft 48 ', and then is cut through the intermittent feeding means 30 and the slack preventing means 40, It is extended to the filling means 80 and set.

  When the operator instructs the operation of the bag-wrapping device 10, the original feed driving means 36 operates to pull out (transfer) the cylindrical packaging material 22A for a specified length specified in advance (S1). Almost simultaneously with step S1, the dancer shaft 42A is lifted by the cylindrical packaging material 22A, and slides and rises within the long hole 46A while abutting (pressing) the wire 42A-2 (S2). At steps S1 and S2, the right limit switch 42A-1 is set to ON. At steps S1 and S2, the support shaft drive unit 44A-1 is stopped. In other words, since the support means driving means 44A-1 is stopped, the dancer shaft 42A can be lifted upward by pulling the cylindrical packaging material 22A forward by the drive means 36 for feeding the original fabric. It becomes possible.

  The dancer shaft 42A lifted by the cylindrical packaging material 22A rises by sliding in the long hole 46A while abutting (pressing) the front surface of the right portion against the wire 42A-2, but when it rises to a certain height. The right limit switch 42A-1 is set to OFF (S3). The right limit switch 42A-1 transmits this off setting information (off information) to the corresponding support shaft drive means 44A-1 (S4). When the support shaft driving means 44A-1 receives the off information (S5), the support shaft 44A rotates (S6). The support shaft 44A rotates and the cylindrical packaging material 22A is pulled forward, so that the dancer shaft 42A presses the upper surface of the cylindrical packaging material 22A and contacts (presses) the wire 42A-2, while inside the long hole 46A. Is lowered by its own weight (S7).

When the dancer shaft 42A lowered by its own weight is lowered to a certain height, the right limit switch 42A-1 is set to ON (S8). The right limit switch 42A-1 transmits this ON setting information (ON information) to the corresponding support shaft drive means 44A-1 (S9). When the support shaft drive means 44A-1 receives the ON information (S10), the drive is stopped and the support shaft 44A is stopped (S11).
As described above, the right limit switch 42A-1 draws the cylindrical packaging material 22A from the raw roll 20A and slides the dancer shaft 42A in the long hole 46A, and the wire 42A-2 is in the long hole of the dancer shaft. ON / OFF setting is repeated within a range where the position of the can be continuously detected. The right limit switch 42A-1 transmits on / off information to the support shaft drive means 44A-1 to start or stop the drive of the support shaft 44A.
The cylindrical packaging material 22A is transported (intermittently fed) at regular intervals by the intermittent feeding means 30 for each designated length specified in advance, without going to steps S1 to S11. The intermittent feeding means 30 is not interlocked with the left and right limit switches and independently intermittently feeds the cylindrical packaging material 22A at regular intervals.

Next, an operation related to the upper left limit switch 42A-1 ′ among the left limit switches will be described with reference to FIG.
The left limit switch 42B-1 ′ positioned below operates in the same manner as the right limit switch 42A-1 ′ positioned above.
The last end of the cylindrical packaging material 22A is attached to the center (axis) of the raw fabric roll 20A. Therefore, when the cylindrical packaging material 22A disappears from the raw roll 20A, the cylindrical packaging material is stretched around the driving means 36 for feeding the raw fabric, and the dancer shaft 42A located between the auxiliary shafts 48, 48 ′ rises. Try to continue. However, the left and right ends of the dancer shaft 42A come into contact with the upper ends of the long holes 46A, and the rise of the dancer shaft is restricted. In other words, the dancer shaft 42A keeps its left and right ends in contact with the upper end of the long hole 46A (S1 ′).
Then, the left limit switch 42A-1 ′ transmits on-information to the corresponding support shaft drive unit 44A-1 (S2 ′). When the support shaft drive unit 44A-1 receives the ON information (S3 ′), the drive of the support shaft drive unit stops and the support shaft 44A stops (S4 ′).
As described above, the left limit switch 42A-1 ′ operates only when the cylindrical packaging material 22A disappears from the raw roll 20A, and detects that the cylindrical packaging material has disappeared.

Loosening prevention means 40 (40A, 40B) are respectively provided for the rolls 20A, 20B installed in the width direction so that the dancer shafts 42A, 42B of the loosening prevention means can be operated in the vertical direction. Each is arranged. That is, (at least two) raw fabric rolls 20A and 20B are installed in the width direction, whereas the dancer shafts 42A and 42B installed in the width direction operate in the vertical direction without interfering with each other. So that they can be spaced apart in the vertical direction. Therefore, as compared with the configuration in which the dancer shafts 42A and 42B are erected (arranged) in the width direction, the wrapping device 10 does not take up space in the width direction (left and right direction), and the wrapping device is downsized. be able to.
Furthermore, since at least two original fabric rolls 20A and 20B are installed and the slack preventing means 40 is provided for each original fabric roll, high productivity can be realized as compared with the case of one original fabric roll.
The support shaft driving means 44A-1 and 44B-1 and the corresponding dancer shafts 42A and 42B are interlocked via limit switches 42A-1, 42A-1 ′, 42B-1, and 42B-1 ′. In addition, since it is sufficient to fold back the path of the cylindrical packaging materials 22A and 22B with at least the dancer shaft in the packaging device 10, the configuration of the packaging device is not complicated.

  The dancer shafts 42A and 42B can operate in the vertical direction by pressing the upper surfaces of the cylindrical packaging materials 22A and 22B drawn from the raw roll. Therefore, the dancer shaft operates downward while pressing the upper surfaces of the cylindrical packaging materials 22A and 22B when operating downward. Thereby, slack of cylindrical packaging materials 22A and 22B can be removed.

In the embodiment (FIGS. 1 and 2), the left and right original fabric rolls 20A and 20B are represented by the same diameter. However, if the lengths of the rolls 20A and 20B are different on the left and right, when the cylindrical packaging materials 22A and 22B are pulled out from the roll by a specified length, the rotation angles of the respective support shafts 44A and 44B Will be different. For example, if you try to draw out the same specified length of cylindrical packaging material from a large-diameter roll and a small-diameter roll, the small-diameter roll will rotate more than the larger-diameter roll. An angle is required. As described above, when the support shafts 44A and 44B are not configured to be driven (that is, when the support shaft is composed of a single shaft), when the cylindrical packaging material for the same specified length is to be pulled out, Since the rotation angles are different, it is not possible to provide a plurality of original rolls having different diameters.
However, as long as the support shafts 44A-1 and 44B-1 can be driven by the support shaft drive means 44A-1 and 44B-1, respectively, the raw materials having different diameters (that is, the rotation angles of the raw rolls 20A and 20B) are different. The cylindrical packaging material for the same specified length can be pulled out from the roll. Therefore, a plurality of original fabric rolls 20A and 20B having different diameters can be used simultaneously.

  A pair of auxiliary shafts 48, 48 'is further provided in the slack preventing means 40, and the cylindrical packaging materials 22A, 22B are arranged in the order of the rear auxiliary shaft 48, the dancer shafts 42A, 42B, and the front auxiliary shaft 48'. By spanning between them, the pair of auxiliary shafts provided so as not to move with respect to the dancer shaft is supported and the tubular packaging material can be stretched under a constant tension. Thereby, slack of cylindrical packaging materials 22A and 22B can be further removed.

The two support shafts 44A and 44B for supporting the original fabric rolls 20A and 20B, respectively, are cantilever beams whose one ends are placed on the two cylindrical rotating bodies 44A-11 'and 44A-12' of the motor. It has become. For this reason, the free ends of the support shafts 44A and 44B may sink and be inclined, and the support shaft may not be maintained horizontally. If the support shafts 44A and 44B are not kept horizontal, the cylindrical packaging materials 22A and 22B are distorted and fed out from the raw roll on the support shaft.
However, a common holding shaft 144 is inserted into the two support shafts 44A and 44B, and each support shaft is rotatably held via the bearings 144A-2 and 144B-2. Therefore, none of the support shafts 144 is inclined and maintained in a horizontal state, and the cylindrical packaging materials 22A and 22B are sent out from the raw rolls 20A and 20B on the support shafts 44A and 44B without being distorted. Since the common holding shaft 144 holds the two support shafts 44A and 44B, the support shaft can be held with a simple configuration. Furthermore, since it is hold | maintained at the holding shaft 144 via bearing 144A-2, 144B-2, smooth rotation of each support shaft is ensured.

  The dancer shafts 42A and 42B of the respective slack preventing means are lifted and lifted by the cylindrical packaging materials 22A and 22B, and are lowered by the weight of the dancer shaft. Therefore, the drive means for the dancer shaft itself is unnecessary. However, the complexity of the configuration can be avoided. The cylindrical packaging materials 22A and 22B are stretched under a constant tension between the fixed auxiliary shafts 48 and 48 'by lowering the dancer shafts 42A and 42B under their own weight. Needless to say, the slack of the packaging material can be removed.

  If the left and right ends of the dancer shafts 42A and 42B are guided by the elongated holes 46A and 46B extending in the vertical direction and slide in the vertical direction, the dancer shaft slides smoothly and falls off the bag-wrapping device 10. Is prevented.

  In the embodiment, two long holes 46A and 46B are provided, but they may be a common (one) long hole or a plurality of long holes. If there is one long hole, the structure of the bag-wrapping device is simplified. If it is the structure which provides a long hole with respect to each of several dancer shafts, the operation range of the up-down direction of a dancer shaft can be prescribed | regulated by the upper and lower ends of a long hole, for example.

  If the configuration is such that a pair of left and right auxiliary plates 10-1 ′ is provided, a long hole is formed in the auxiliary plate, and a dancer shaft and an auxiliary shaft are installed between the auxiliary plates, the long hole is provided on the inner surface of the bag-wrapping device. In addition, the structure of the wrapping device is simplified.

  Further, as described above, since the means other than the slack preventing means 40 (intermittent feeding means 30 and the like) are provided in common instead of each of the cylindrical packaging materials 22A and 22B, the conventional bag-wrapping device is provided. This part can be used as it is, and the number of parts to be added can be minimized.

As described above, according to the present invention, the slack preventing means is provided for each of the raw rolls, and the dancer shafts of the slack preventing means are arranged apart from each other in the vertical direction. It is possible to reduce the size of the bag-wrapping device without taking up space. And at least two original fabric rolls are installed, and two or more packaging bodies can be formed from two or more cylindrical packaging materials. Therefore, it is possible to realize high productivity as compared with the case of one raw roll.
In addition, the cylindrical packaging material is controlled only by the pulling from the raw roll by the interlocking of the driving means of the support shaft and the corresponding dancer shaft, and the path only needs to be folded at least by the dancer shaft. Therefore, the configuration of the bag-wrapping device is not complicated.

  The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention in any way, and all modifications and alterations made within the technical scope of the present invention are included in the present invention. Needless to say.

  For example, a packaging material formed in a cylindrical shape is applied to a bag-wrapping device that forms a continuous packaging body from an original roll rolled in a roll shape, but the packaging material is formed in a cylindrical shape in advance. It is not limited. For example, means for forming at least two (two rows) of cylindrical wrapping materials by preparing at least two sets of raw rolls wound with one film material and superimposing the film materials on top and bottom and applying vertical seals After that, a series of means of the sachet device of the present invention may be operated to form a package.

  The present invention is applied to a bag-wrapping device that continuously forms a package (bag).

DESCRIPTION OF SYMBOLS 10 Wrapping device 20A, 20B (Left, right) Original fabric roll 22A, 22B Cylindrical packaging material 30 Intermittent feed means 36 Intermittent feed drive means 40 (40A, 40B) Slack prevention means 42A, 42B Dancer shaft 42A-1 42A-1 ', 42B-1, 42B-1' A pair of left and right limit switches 44A, 44B Support shaft 44A-1, 44B-1 Support shaft drive means 46A, 46B Long holes 48, 48 'Auxiliary shaft 144 Holding shaft 144A-2, 144B-2 Bearing

Claims (8)

Intermittent feeding means for intermittently feeding the cylindrical packaging material from the roll roll of the cylindrical packaging material in which the film material is formed into a roll shape, and slack for preventing the loosening of the drawn cylindrical packaging material A wrapping device comprising a prevention means,
The cylindrical wrapping material is pulled out from at least two raw rolls installed in the width direction,
The intermittent feed means has an intermittent feed drive means for intermittently feeding the cylindrical packaging material,
The slack prevention means has a dancer shaft, a support shaft, and a drive means for driving the support shaft for rotationally driving the support shaft, and is provided for each raw roll.
The support shaft supports the fabric roll,
The dancer shaft is arranged in parallel with the support shaft, presses the upper surface of the cylindrical packaging material drawn from the raw roll and folds up the cylindrical packaging material, and can be operated in the vertical direction.
The drive means of the support shafts operate in conjunction with the corresponding dancer shafts, respectively, to control the withdrawal of the cylindrical packaging material from the raw roll,
A wrapping device in which each dancer shaft is spaced apart in the vertical direction. The loosening prevention means further includes a pair of auxiliary shafts separated from each other in the front-rear direction,
The pair of auxiliary shafts are provided in front of and behind the dancer shaft, in parallel with the dancer shaft and above the dancer shaft so as not to move relative to the dancer shaft.
The cylindrical wrapping material pulled out from the raw roll is wound around the upper surface of the rear auxiliary shaft, the lower surface of the dancer shaft, and the upper surface of the front auxiliary shaft, respectively, and the rear auxiliary shaft, the dancer shaft, and the front auxiliary shaft are The wrapping apparatus according to claim 1, which is stretched between three shafts in order.   The wrapping apparatus according to claim 1 or 2, wherein a common holding shaft is inserted into the plurality of support shafts, and each support shaft is rotatably held via a bearing.   4. The wrapping apparatus according to claim 1, wherein the dancer shafts of the respective slack preventing means are lifted and lifted by the cylindrical packaging material, and are lowered by the weight of the dancer shaft.   5. The wrapping apparatus according to claim 4, wherein the dancer shafts of the respective slack preventing means slide in the vertical direction while the left and right ends thereof are guided by elongated holes extending in the vertical direction. A pair of left and right limit switches are attached to the top of the long hole that allows the left and right ends of the dancer shaft to slide inside,
The left or right limit switch detects the position in the long hole at the left or right end of the dancer shaft,
6. The wrapping apparatus according to claim 5, wherein the other limit switch detects that the end of the dancer shaft is in contact with the upper end of the long hole.   The wrapping apparatus according to claim 6, wherein the plurality of dancer shafts of the respective slack preventing means slide in the vertical direction while being guided by one or a plurality of elongated holes that can slide without interfering with each other. The dancer shaft and auxiliary shaft of the loosening prevention means are installed in the frame body,
The pair of left and right auxiliary plates are provided on the inner side surface of the frame body, the long holes are respectively formed on the left and right sides of the auxiliary plate, and the dancer shaft and the auxiliary shaft are installed between the auxiliary plates. Pouch device.

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